Siscomex imports in Brazil: access, Duimp and how to register in 2026

Siscomex imports is the set of Brazilian government systems where a company files its import declaration, calculates duties and follows customs clearance. In 2026, filing happens on the Portal Único (the Single Foreign Trade Portal) through the Duimp, with a company registered in Radar and logged in by digital certificate or a gov.br silver or gold account.

The shipment is already in the air and the buyer's company still has no Radar registration? That is how many importers learn that Siscomex is not a form you fill in the night before. And 2026 adds a twist: Brazil is switching off the old import declaration in stages, and a declaration filed in the wrong system gets cancelled.

What is Siscomex and where does it fit in an import?

Siscomex stands for Sistema Integrado de Comércio Exterior, Brazil's Integrated Foreign Trade System, created by Decree No. 660 of 1992. It records and controls every formal import and export, with the Receita Federal (Brazil's Federal Revenue Service) in charge of customs and Secex (the Foreign Trade Secretariat) in charge of administrative controls.

Today "Siscomex" is an umbrella name for three separate environments, each with its own entry point:

• Siscomex Importação: the legacy system for the DI (Declaração de Importação, the old import declaration) and the LI (import licence).
• Portal Único: the new environment, home to the Duimp, the Product Catalogue, licences in LPCO format and company registration.
• Siscomex Remessa: the system for international parcels, operated by courier companies, with no direct access for the recipient.

Siscomex is one stage of a longer process that starts with choosing a supplier and ends with delivery. The full route, with costs and timelines, is in the guide to importing into Brazil. This article stays with the system.

Where do you log in to Siscomex?

The entry point is portalunico.siscomex.gov.br, under the "Importador/Exportador/Despachante" option. People searching for "Siscomex Web" usually want exactly this: the place where you log in and file the declaration online.

Once inside, the Import module holds the day-to-day tools. According to the Receita Federal manual updated in April 2026, the menu includes:

• Drafting and checking a Duimp.
• Document upload and the operation's electronic dossier.
• LPCO: licence requests and the administrative treatment simulator.
• Tax treatment, with a duty calculation simulator.
• Centralised payment, with the bank accounts authorised for direct debit.
• Look-up of old DIs and LIs.

One thing you only notice on the first login: different user profiles see different menus. If a function is missing, the selected profile is the usual culprit, not a lack of permission.

DI or Duimp: which declaration applies in 2026?

For air and ocean imports by companies with unlimited or express Radar, the general rule is already the Duimp (Declaração Única de Importação, the single import declaration). The official schedule has been retiring the DI in phases, most recently on August 31, 2026, with bulk ocean cargo leaving the DI on October 11 and every remaining operation on December 1, 2026. Source: Siscomex, DI shutdown schedule, version of September 14, 2026.

The rule has teeth. Under Portaria Coana No. 165/2024, which the Receita Federal restated in August 2026, a DI filed for an operation where the Duimp is mandatory is cancelled by customs. Siscomex publishes a shutdown simulator that tells you, by type of operation, which declaration applies today. Check it whenever an operation falls outside your routine.

There is one exception that hits new importers in particular. The Receita Federal states that the Duimp serves individuals and companies registered in any Radar category other than "limited". A company with limited Radar keeps filing DIs until the final date of the schedule. Source: Receita Federal, Duimp filing page, August 2026. The schedule is already on its 27th version, so check the date again close to shipment.

The table shows what changes in practice when an operation moves from DI to Duimp:

Sources for the table: Receita Federal, Duimp and Product Catalogue Q&A documents and Duimp filing page, 2024 to 2026.

How does a company register in Radar?

Radar is the registration that allows a Brazilian CNPJ (company tax ID) to trade internationally, and without it there is no Siscomex import at all: no Duimp, no DI. The request goes through the Sistema Habilita inside the Portal Único, and it must be made by a partner or director listed in the company's ownership record.

Check the Receita Federal requirements first: enrolment in the DTE (the tax authority's electronic mailbox), an active CNPJ, and a regular (or pending regularisation) CPF, the individual taxpayer ID, for every partner or director with power to represent the company. One suspended CPF in that group is enough to block the request.

The system places the company in one of three categories. For the last two, the test is estimated financial capacity, based on federal taxes paid in the current year and the four previous ones, divided by the average dollar rate:

• Express: publicly listed corporations and their wholly owned subsidiaries, state-owned companies and mixed-capital companies. No operating limit.
• Limited: up to US$ 50,000 or up to US$ 150,000 in imports per six-month period, counting customs value, freight and insurance to the place of unloading.
• Unlimited: estimated capacity above US$ 150,000 per six months, with no operating limit.

Source: Receita Federal, Normative Instruction RFB No. 1,984/2020 as amended by IN RFB No. 2,292/2025, and the Sistema Habilita manual, checked in September 2026.

The practical upshot: a newly opened company with little tax history tends to land in the US$ 50,000 bracket. If the import plan for the semester goes beyond that, request a review of the estimate in the Sistema Habilita, or through a digital case, before the first order goes to the supplier. Finding the ceiling with goods already on the way means paying storage.

How do you access Siscomex to file an import?

Access to the Portal Único is personal, through the CPF of whoever will operate it. Under the Receita Federal access manual, updated in June 2024, two login methods are accepted: a digital certificate or a gov.br account at silver or gold level. Bronze accounts do not get in.

Once the company is registered, set things up in this order:

1. The legal representative, whom the system calls the "cadastrador sócio-dirigente", logs in first with the registered CNPJ.
2. In the Cadastro de Intervenientes module (the register of parties), they add other representatives, including the despachante aduaneiro (licensed customs broker), each with the profiles they need.
3. On the same screen, they appoint the Product Catalogue manager. Only that person can add products and foreign operators.
4. The team registers recurring items in the catalogue, with NCM code and attributes. The catalogue is tied to the root of the CNPJ, so it covers every branch.

What should a foreign supplier know about the Product Catalogue?

If you sell to Brazil, your buyer's catalogue holds data about you. The Receita Federal requires products and foreign operators, such as the manufacturer or producer, to be registered before the Duimp is filed, and the Duimp pulls product data straight from that catalogue. Source: Receita Federal, Product Catalogue Q&A, October 2024.

In practice, the NCM code and product description in your buyer's catalogue should be consistent with the HS code and description on your commercial invoice, and your company name and address should match the catalogue entry. The NCM is Mercosur's tariff code and builds on the HS code, so agreeing on the classification before the first shipment saves a round of corrections.

How do you file an import on the Portal Único, step by step?

Filing a Duimp follows a fixed sequence, and each step depends on the one before it.

1. Check the shutdown simulator and confirm the operation is Duimp.
2. Confirm the product and the foreign operator are registered and active in the catalogue.
3. Run the administrative treatment simulator for the NCM. If a regulatory agency is involved (Anvisa for health products, MAPA for agriculture, Inmetro for certified goods), request the LPCO early: some licences must be issued before shipment.
4. Draft the Duimp: importer, supplier, Incoterm, goods value, freight and insurance, and the cargo linked to the transport document.
5. Run the diagnostic. It fills in the administrative treatment tab and shows pending issues before filing.
6. File. Federal import taxes and the Siscomex usage fee are debited from the authorised bank account.
7. Watch the channel. Green means release without inspection; in other channels, upload the import documents to the dossier and answer any requests.
8. Once cleared, the goods move on to delivery.

A date to note: from September 27, 2026, the Duimp starts calculating CBS and IBS per item, the new consumption taxes of Brazil's tax reform. This year the amounts appear in the calculation summary but are not to be paid. Source: Receita Federal, August 2026.

Do you need a customs broker?

No, it is not mandatory. The company can file the Duimp through its own registered representative, and a broker joins as a credentialed representative in the register of parties, acting on the importer's behalf.

For the first operations, hiring one pays off. Tariff classification, regulatory checks and replies to customs requests are what eat up time, and that is the broker's daily work. Agree early on which profiles they need and who manages the catalogue, which prevents a Duimp stuck for lack of permission.

What happens when the import arrives by courier?

With an express shipment, the courier company files the declaration, not the recipient. Under the Receita Federal international parcels manual, updated in August 2024, the DIR (Declaração de Importação de Remessa, the parcel import declaration) is filed in Siscomex Remessa by the courier for parcels with a customs value of up to US$ 3,000.

Two conditions matter for companies: a DIR in a company's name only covers goods that do not require an import licence, and a recipient who prefers another declaration must tell the courier in time and file it themselves or through their representative. What happens at the border after that is covered in the guide to customs clearance and restrictions.

Which mistakes most often block a Siscomex filing?

The errors that stop an import in the system are rarely typing errors. They are preparation errors:

• Filing a DI for an operation that already requires a Duimp. The DI is cancelled and the clock restarts.
• Breaching the six-month ceiling of a limited Radar in the middle of a large order.
• A catalogue entry with the wrong NCM or a blank mandatory attribute, which affects every Duimp for that product.
• Requesting a licence after the operation's shutdown date and then trying to link it to a DI.
• A credentialed representative without the profile for the task at hand.
• Duimp values that do not match the commercial invoice, even by cents.

Frequently asked questions about Siscomex imports in Brazil

Sources

• Siscomex (Secex e Receita Federal): Cronograma de Desligamento DI, versão 27 de 14/09/2026
• Siscomex: Simulador Desligamento DI
• Receita Federal: Migração da DI para Duimp (Portaria Coana nº 165/2024), atualizada em 10/08/2026
• Receita Federal: Elaboração da Duimp, atualizada em 25/08/2026
• Receita Federal: Portal Único (Pucomex), atualizado em 08/04/2026
• Receita Federal: Perguntas e respostas: Catálogo de Produtos da Duimp, 04/10/2024
• Receita Federal: Perguntas e respostas: Duimp, 28/11/2024
• Receita Federal: Reforma Tributária do Consumo na Duimp, 19/08/2026
• Receita Federal: Habilitação via Sistema Habilita
• Receita Federal: Modalidades Limitada e Ilimitada (IN RFB nº 1.984/2020)
• Receita Federal: Instrução Normativa RFB nº 1.984/2020
• Receita Federal: Acesso ao ambiente de operações do Portal Único Siscomex, atualizado em 20/06/2024
• Receita Federal: Declaração aduaneira de remessas internacionais, atualizada em 01/08/2024
• Receita Federal: Taxa de utilização do Siscomex (Lei nº 9.716/1998)
• Presidência da República: Decreto nº 660, de 25 de setembro de 1992

Get access in place before the first order

The sequence that works is registration, access and catalogue first, supplier order second. Reverse it, and the goods land in Brazil before anyone can declare them, while storage charges run by the day.

If your shipments to or from Brazil move by express and you want pickup, transport and clearance on the same track, open a DHL Express business account.